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A method for controlling the frequency of an air conditioner compressor

An air-conditioning compressor, frequency control technology, applied in the control input involving air characteristics, space heating and ventilation control input, heating and ventilation control systems, etc., can solve the problems of complex control, inaccurate frequency control, etc. Good experience, ensure stable operation, and the effect of stable air conditioning operation

Active Publication Date: 2017-02-08
HAIER GRP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Patent No. 201010169218.1 of the invention patent "Air conditioner compressor frequency control method and control device" discloses a PID control method when the temperature difference is equal to 0°C and the room load changes, while other conditions use Fixed frequency control or frequency intervention control still has the problem of inaccurate frequency control and complex control

Method used

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  • A method for controlling the frequency of an air conditioner compressor
  • A method for controlling the frequency of an air conditioner compressor
  • A method for controlling the frequency of an air conditioner compressor

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specific Embodiment 1

[0044] Such as figure 1 As shown, this embodiment takes the cooling mode as an example to illustrate the specific implementation of the present invention. The entry into the cooling mode mentioned in this embodiment includes the first power-on to enter the cooling mode, the mode switching to enter the cooling mode, and the shutdown and restart to enter the cooling mode. mode etc.

[0045] After the air conditioner is turned on, the air conditioner detects the indoor temperature T 室内 , since in the PID control process, the calculation accuracy is 0.1 degree, therefore, let Pn=(T 室内 -T 设定 )*10.

[0046] When entering cooling mode for the first time, compare Pn with the cooling first temperature difference and the cooling second temperature difference:

[0047] If P n>The first temperature difference of refrigeration, control the compressor to run at the highest frequency fmax; during the operation, the air conditioner detects T in real time 室内 , and get P n , if P n ≤The...

specific Embodiment 2

[0081] Such as figure 2 As shown, this embodiment takes the heating mode as an example to illustrate the specific implementation of the present invention. The entry into the heating mode mentioned in this embodiment includes the first power-on to enter the heating mode, mode switching to enter the heating mode, and shutdown Then turn it on and enter the heating mode.

[0082] After the air conditioner is turned on, the air conditioner detects the indoor temperature T 室内 , since in the PID control process, the calculation accuracy is 0.1 degree, therefore, let P n =(T 设定 -T 室内 )*10, where, T 设定 = Manually set temperature + set temperature correction value.

[0083] When entering heating mode for the first time, set P n Compared with heating first temperature difference and heating second temperature difference:

[0084] If P n >The first temperature difference of heating, the compressor is controlled to run at the highest frequency fmax; during the operation, the air c...

specific Embodiment 3

[0102] Such as Image 6 As shown, this embodiment takes the dehumidification mode as an example to illustrate the specific implementation of the present invention. The entry into the dehumidification mode mentioned in this embodiment includes the first power-on to enter the dehumidification mode, the mode switching to enter the dehumidification mode, and the shutdown and restart to enter the dehumidification mode. mode etc.

[0103] After the air conditioner is turned on, the air conditioner detects the indoor temperature T 室内 , since in the PID control process, the calculation accuracy is 0.1 degree, therefore, let P n =(T 室内 -T 设定 )*10.

[0104] When entering the dehumidification mode for the first time, set the P n Compared with the first temperature difference of dehumidification and the second temperature difference of dehumidification:

[0105] If P n>The first temperature difference of dehumidification, control the compressor to run at fmax in dehumidification mo...

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Abstract

The invention provides an air conditioning compressor frequency control method. The method comprises that an air conditioning detects the indoor temperature T [indoor], wherein Pn= T [set]-T [indoor]; Pn is compared with a preset temperature difference, the air conditioning runs at the highest frequency when the temperature difference is large, and the work frequency of the compressor is corrected through an increment PID algorithm when the temperature difference is small, accordingly, rapid refrigeration and heating can be achieved. By the aid of the method, the frequency is controlled to be reduced stably through the PID algorithm, the temperature is kept at a 0.5-degree static difference and is kept at the set temperature finally, the problems of stopping caused by temperature over-regulation can be solved, the air conditioning runs stably, and the user experience is good; when the set temperature and the air speed are changed, the compressor running frequency can respond to changes of the temperature timely, and the frequency is improved and reduced effectively; moreover, the frequency can be adjusted according to the environment temperature, so that the air conditioning stable running can be guaranteed, and the temperature can be adjusted rapidly.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning control, and in particular relates to a method for controlling the frequency of an air-conditioning compressor. Background technique [0002] The frequency conversion air conditioner can automatically adjust the operating frequency of the compressor according to the change of the indoor temperature, and then change the speed of the compressor to realize the adjustment of the operating state of the air conditioner. Inverter air conditioners have broad market prospects due to their advantages such as fast temperature adjustment, low noise, low energy consumption, and long service life. [0003] Existing frequency conversion air conditioners generally use a look-up table control method or a PID control method as a compressor frequency control method. The look-up table control method is to obtain the frequency values ​​corresponding to different temperature differences and temperature differ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/00
CPCF24F11/30F24F11/83F24F2110/10
Inventor 程永甫宋世芳刘聚科许国景
Owner HAIER GRP CORP
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